Question about Microwave Ovens

Open Question

Kenmore microwave mod. # 721.62463200 Fire

While making popcorn a fire started inside the wall of the unit. It melted the paint and blackened the area. Good thing I was close by and it was on for only a short time, I hate to thing what might have happened had I set it for a longer duration and left the area. There is a metal panel on the side that is removable. Looking inside there is a plug in cylinder that has a hole burned in it. What is the problem and can it be fixed? I also saw some other units were recently recalled. Any info on this unit?

Posted by on

6 Suggested Answers

  • 8803 Answers

SOURCE: sparking fire inside the microwave - Knemore Model No. 721.80522500

If the sparking has stopped, that should be fine.

If you have a burned spot you may need to sand it and repaint it with appliance paint from Wal-Mart, etc.

You can probably replace the shelf bracket / hook if it's still available.

If you'll post your brand and model, we'll see if we can steer you toward a source for a new shelf bracket.

If it's a Kenmore, you can probably find an exploded view by entering your FULL model number here: (the 3 is correct)

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Dec 07, 2007

  • 3130 Answers

SOURCE: lightning inside microwave oven

You better be carefull my friend or you will start glowing in the dark!! LOL Just kidding. But I wont kid about how dangerous that metal cylinder can be with the holes in the top. Thats the magnatron. It has very high voltage going to it and you should never ever touch any wires going to it even if its unplugged as theres a capacitor in there that holds a charge for a time. f the oven is over several years old, Im sure the magnatron will cost more then a new oven, after you add labor and such. It just migfht be time to upgrade to a new microwave?? Good Luck

Posted on Aug 11, 2006

  • 1 Answer

SOURCE: Small 10 sec fire in microwave

Whirlpool had a recall on many microwaves due to this problem. Call Whirlpool and see if yours is one of them. My microwave model was mh7140xfb and was on the recall list.

Posted on Dec 29, 2008

  • 140 Answers

SOURCE: microwave smells of electrical fire

The magnetron inside the microwave is starting to short out to ground. This happens after use there are small minute cracks on the body of the magnetron and those small cracks are big enough for 15,000 volts and up to 30,000 volts to leak through and arc to ground. It is not a small short but a big one. Replace the magnetron before it burns holes inside your microwave. Replacing the magnetron if you can find it locally or through the internet is pretty straightforward. Unplug the microwave and take the cover off about 6 screws. On the same side as the control panel and right behind it you will find the microwave on top. It is held in place with only three to four big screws. It will have about 4 wires with terminals on them that plug into a couple of places one being the large capacitor that stores all the voltage and discharges it through the magnetron. Take the terminals off and I always recommend with some needle nose pliers with insulated handles. There is nothing to unsolder and to solder. Its like replacing the battery in your car or the electronic module. Take care and good luck.

Posted on Jan 22, 2009

  • 276 Answers

SOURCE: Paint damaged in side microwave oven

1) How is the cavity damaged? Is it just peeling paint, or is it rust? If it's rust then the microwave could be dangerous.

2) The antenna cap usually has a small hole in the centre, but if there are any other holes in it the magnetron itself could be damaged, and holes caused by the magnetrin arcing.

Posted on Mar 25, 2009

  • 167 Answers

SOURCE: fire inside oven during operation on right side metal plate

Arcing is caused by the build up of grease that is converted to carbon. Clean the baked on carbon from the oven cavity. If regular cleaning doesn't remove the carbon, sand it away and touch up with a similiar color paint.

Posted on Jun 21, 2010

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


1 Points

Related Questions:

1 Answer

Why did it catch on fire?

Any flaws in the painted surface on the inside of the unit will cause a spark and that generates heat. Examine the surfacecor any exposed metal. You have to use special paint to resurface the inside.

Nov 15, 2015 | Microwave Ovens

2 Answers

Need to paint the inside of my 2001/240 v. Ge advanium what do you recommed

I wouldn't recommend painting it. The inside of the microwave is a box that allows microwaves to bounce around off those walls. If you paint the inside of your box you could have a serious fire hazard. I would send and e-mail to GE and see if they recommend anything that is microwave safe.

Mar 26, 2015 | GE Microwave Ovens

2 Answers

Arcing sharp carosel microwave when i put orville redenbacher mini popcorn bags in i found oil on outside of bag

Arcing will occur if you have any metal inside the microwave, or if the powder paint on the inside has been damaged. If the paint is damaged dispose of the microwave

Oct 24, 2013 | Sharp Microwave Ovens

1 Answer

Microwave sparks and makes noise only when fixing microwave popcorn. Otherwise, microwave works fine. The microwave previously worked fine with microwave popcorn. This happened with another brand of...

Hello bruton. As a microwave oven ages, the interior paint often deteriorates as does the internal part that creates the micro waves.

Using this is not a good idea as there is now a fire hazard. The best solution is to replace the microwave. There are sales now and you can get a nice new one for under $100.


Thanks for choosing Fixya!

Mar 23, 2011 | Microwave Ovens

1 Answer

Over heating and shuting off

I am not surprised! Cloth of anysort is not recommended to be placed in a microwave oven!

That includes undies and socks which many try to speed the drying time of.

Regarding the popcorn.. The oven is overheating due to a possible containment in a hutch, where insufficient airflow is available to lower the temperature. Pull the unit away from the wall to allow more airflow, clean the vents and help it breathe.

Please rate my help++++Thanks for using FIXYA

Mar 24, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Can a microwave door be painted on the inside as paint is flaking off. I would like to resurface the inside or the door

No, you can't do that. It would make chemicals from the paint saturate your food. You do not want that.

Oct 11, 2009 | Sharp R-1850A Convection/Microwave Oven

2 Answers

The paint has started to peel off inside my microwave!

NO. The insides are baked on powder coat. If you paint it, you might as well throw it away. The paint can catch fire, even after it is dry.

Aug 07, 2009 | Electrolux Microwave Ovens

2 Answers

Small 10 sec fire in microwave

it may be ok , but it should be checked for internal damage

Dec 10, 2008 | Whirlpool MH7140XF Microwave Oven

3 Answers

Popcorn stain in Microwave

Uhhhmmm, paint? Inside a microwave? YUCK.... that would make food taste like paint.

The yellow stain from microwave able popcorn is most likely a permanant issue. I have heard of the vinegar water, bleach etc working, but never had it work for me.

I don't recommend you painting the inside of a microwave. Some paint is flammable. Almost all paints are toxic.

May 14, 2008 | GE JVM1650 1000 Watts Microwave Oven

1 Answer

Fire inWestinghouse microwave oven

I have contacted the manufacturer, Salton, Inc to complete the warranty. Thank you for the quick response.

Feb 28, 2008 | Microwave Ovens

Not finding what you are looking for?
Microwave Ovens Logo

Related Topics:

495 people viewed this question

Ask a Question

Usually answered in minutes!

Top Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

8803 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Barrett Palumbo
Barrett Palumbo

Level 2 Expert

1772 Answers

Are you a Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides